Area moment of inertia (2nd moment of area) calculation

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Hi everyone,

I’m trying to calculate the area moment of inertia (Ixx and Iyy) for an arbitrary 2D shape. As a simple example, consider a cross-section composed of two circles—I'd like to determine the area moment of inertia for this small circle.

Since the geometry can be arbitrary in other cases, I’m looking for a general method to compute Ixx and Iyy. I’ve noticed that COMSOL (e.g., through the "mass properties" function) provide mass-related properties like mass moment of inertia, but what I need are the area moments of inertia.

If anyone has suggestions or knows how to extract these values, I’d really appreciate your help.

Best regards, Mirhan



2 Replies Last Post 2025年6月6日 GMT+8 04:23
Edgar J. Kaiser Certified Consultant

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Posted: 2 days ago 2025年6月5日 GMT+8 16:17

Hi,

those are integrals across the respective surface. Check the integration options in the Nonlocal Couplings.

Cheers Edgar

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Edgar J. Kaiser
emPhys Physical Technology
www.emphys.com
Hi, those are integrals across the respective surface. Check the integration options in the Nonlocal Couplings. Cheers Edgar

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Posted: 1 day ago 2025年6月6日 GMT+8 04:23

Edgar

Dear Edgar,

Thank you for the response!

I will check your method.

Best regards, Mirhan

>Edgar Dear Edgar, Thank you for the response! I will check your method. Best regards, Mirhan

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